Reporter processed the reports based on the logs taken from ProxySG's access logs. Most of the time if the reports showing an invalid value, check the ProxySG's access logs. Verify the values reported are correct.
In Reporter 9, if the Top 5 Categories report in the dashboard is showing Unavailable;Unlicensed, this is probably caused by an unlicensed content filtering solution used on the ProxySG. Check the content filtering license for the vendor that you are subscribed to and make sure it is still valid.